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Description
Improved Cylinder Retention Design
The new design incorporates machined vertical grooves that
reduces the potential for miscasts due to the smoother alloy
flow onto the gold alloy cylinder during casting. The vertical
grooves provide mechanical retention and are designed to
eliminate the problem on previous UCLA designs of the alloy
stopping on the horizontal retention instead of flowing to the
margin.
The chamfer margin design provides a smooth transition
from the gold alloy cylinder to the cast alloy at the junction. It
also aids in the prevention of alloy flowing onto the interface
area of the gold alloy cylinder during casting.
The collar height has been reduced from 1mm to 0.25mm to
provide greater flexibility when fabricating restorations for
implants with shallow tissue depths. This allows the restoration
to emerge from the implant platform more quickly and to add
porcelain closer to the implant platform on screw retained
restorations.
The reduced collar height may cause an undercut laterally
around the implant platform. The undercut should be
removed after casting by tapering the collar back.